Liraglutide efficacy and action in non-alcoholic steatohepatitis (LEAN): study protocol for a phase II multicentre, double-blinded, randomised, controlled trial - Armstrong, M; Barton, D; Gaunt, P; Hull, D; Guo, K; Stocken, D; Gough, S; Tomlinson, J; Brown, R; Hübscher, S; Newsome, P (BMJ Open, 2013)